Angle-mill.



I. B. CORNWALL.

ANGLE MILL.

APNIC/mon FILED MAR4 4j Isls.

Iamuvd June T22, 1915.

2 SHEETS-45Min I A I n l Il l. B. CORNWALL.

ANGLE MILL.

APPLICATION HLED MARA. 1915 Patented June 22, 1915.

2 SHEETS--SHET 2.

a Malt nal;

-heiieby declare that UNITED STATES. PATENT OFFICE.

norm.. B. jeoRNW'ALL, or MOLINE; ILLINOIS, -,as slei'aon. To, BABNAILD AND 'LEAs MANIT- I'Acf'UnINe COMPANY, .-oFmoIfINn, ILLINOIS, n conBoRn'rIoNoF ILLINOIS.

ANGLEfmILI;

y specification of terms Patent.

Patented June 22,1915.

appneationnied Maren 4, i915. serieu No; '12,01526.'

' To all 'whom 'it may] concern Be it known thatngI ,ogn B.. v ConNwAr-L- a cnam-n of the "UntedlStates, residing at M of Illinois, have invented certain 'new and nsefwl Improvements in AnglelMill's; and I the following is a full, clear, and `exact description thereof, reference being had to the accompanying drawings, Which'form'part of this. specification.

Thisiiivention is a novel machine for treating the granulated product' of grain in the process of making flour, and .which I call an angle inillfvand is'des'igned to f'uiish the product [delivered-from crushing-rolls, by 4detaching the crushed hulls by pressing a d rubbing ch product sojthatthe separat d crushed kernels will pass the sieve cloths in the form of flour. When grain is crushed between rolls the crushed particlcsloffikernelsfand hulls havea tendency-to cling together, not being fully separated, and it is necessary to detach such particlesfrom each lotherfiin order to sepa ratel the flour from'tliebra-n or hulls'. This is customarily done by pa'ssing the crushed material'- over sieyes to separate such particles. of {iourv as are fine-enough to passthrou-gh the Asieves and then regrinding the remainder. This reg'rinding will, to a greater or less extent, reduce some particles of the bran or hullsl so ne, that they can pass through .the flour sieves .and cause the l flour t0 have a dark. appearance. By pass- .ing the crushed product from the grinding rolls, and before it is bolted or sieved,

through my novel machine, a v ery much larger proportion of@ the kernels' is enabled to go through the sieves Ias flour, thereby simplifying the final operations on the product andenhancing the quality of the flour.

Myv novel machine-comprises in brief a chamber in which are located novelvparti- .tions and scrolls, or packer screws, alternatng therewith, and `which pressi the material through the openings in said partitions toward a yielding valve which 'regulates the desired amount` of pressure applied; and as the material passes through this machine it is rubbed between the faces of the scrolls and opposed stationary parts,v

with the desirable results above set forth.

distinct-ive feature of my machine isthat the materiail isalternately compressed and released as it passes vthrough the ma-v 'oline, in the countyioffRock 'Islan'd and State' crushed but not separated,

irni is from the chine s' 0 that the particles ofkerne'ls are very thoroughly .detachedfrom particles of hulls u u flour is injured. A- I will explain thel i nv'ention as embodied in the machine illustratedin the accompany-l ing drawi gs, and set forth in. the claimsthe features 'f nd combinations of parts for which I desire protection.

In Asaid drawings: Figure 1'- is a, 1ongitudinalsectional elevation of the complete maphine. Fig. 2 i's atrend View thereof. Fig. 3 is a section ,on line'3-3,.Fig. 1.

. Themachine comprises a `body preferably' foi-med of upperand lower halve-s A and A provided with exterior axigesL s' shown, by which they can be bolted togetlier'to form a closed cylindrical` chamber.' The upper portion A' is provided at? one end With an inlet 1C Wherefthe material to be-treated isintroduced. The parts A, AQ are provided at their ends or-heads with axial bearings N' for a main shaft S;'said bearings are of ordinaryl construction-and may be provided at their linner ends with annular chambers n around the shaft in which Waste may be placed to prevent loil working back from the bearings into the interior o thebody.

lThev body` is shown as supported upon standards M which have their' upper ends concaved to fit the4 underside of the part A', and may bebolted theretov as indicated inthe drawings.

` The part A has adischarge opening a at its end' opposite the linlet C, which opening may,l be yieldably closed by means of a valve E fixedly attached to aslidable bar J which is supported-and guided in axially alined openings in the standards M on this bar J is secured a depending arnn which can be adjusted on the bar J 'and .fixed by a set-bolt or other suitable means.

This arm I is engaged by the short arm of i a lever H which is pivoted on a bracket H2 105 attached vto the adjacent standard M as shown and on the long arm of this lever H andjif the material to l as shown; and

yieldingly held against and closes Voutlet a,A

but will open when sufficient' material and pressure accumulates within the body;

its lower end, =andfthe material' escaping" Y'through .outlet a may bedischa rgedv through 'this Ihousing .into any suitable receiver or. conductor. -lnithe outer v Wall of housing the member A', said housing being open at 'arid-opposite valve E, is .an opening which `is closed by a removabledoor K, whichfcan 'be detachably secured-.imposition' by'a'piv# otedr latch lo,

' I make'these parts b Within the body-.and mounted upon the shaftS" are a series of Scrolls`,or packer blades, D-which maybe ofany suitable construction, I preferably u se scrolls having o ne complete spiral. .Three such scrolls are used -in the machine shown in the drawings, one of these being -ixed on the shaft belowg the feed openingfC.

Between each adjacent pair of scrolls and within the -body is an annular partition B, o f peculiar construction,AV each comprising a ring portion having an 'annular series of approximately triangular inwardly projecting parts b' on 'its inner periphery,- the apexes ofsaid arts?) p'ointingtoward the axis of the sha t.- Preferably each part b is also slightly taperedon its'broader. sides from 'its base toward its apex..

triangular in shape,

A as the greatest portion ofthe material being passed through Vthe machine is nearest the outer circumference of the chamber, and the angular parts b'providef an increasing retardingsurface toward the periphery of the chamber or converselyprovide an opening for" the passage of material enlarging toward the axis ofthe partition and contracting toward the periphery thereof.` The material should not bel retarded any longer or to any greater extentv than is necessary to `'compress-'the material momentarily and then immediately release it, in order to detach the crushed particles of kernels entirely from the crushed particles of bran .or hulls. My machine will successfully detach-all flour particles from the bran Without comniinuting the branyand thep'arts b of said partitions 'present sufficient surface to insure "the detacliing Iof particles that are already layer W.

character gular with their apeXes toward the cen;er ;t1i'^ pressure overcomesvthreflstan 0in nearlyfbrolren' apart, while the finishing work i's'-done by pressure of thematerial against the' diagonally grained wood It has also been foundY that the best shape also the passage for -t-he material through tions, and because'of-these parts 'b Icall my i-nventionan angle millff j I The rearend Wall of the bdyadjaeent i the discharge opening a'is lined interiorly The valve E is preferably protected by a I housing K 'attached'td the adj'acent` end of with wood, as indicated at W; such lining the discharge opening a. This lining isso This brings 'the elective working surfaces,

f the partitions, in the most desirable posiihavingan opening 'w Vcorresponding w it h the axis of the shaft of the cylinder andpurposely lpreferably Iinclines downwardly and inf;v wardlvfron'i the vend Wall of the'body,zasf

to the material, vand at the same time rapid Iwear of the wood is prevented. It is un. desirable to employ iron or metal surfaces at this point, as iron 1s apt t0 wear and detach particles of bran which mingle with the flour and make so-called f darkv ourflwhile rubbing the material against wood does not have v this effect.

Power can preferably at the end adjacent the feed spout C, by any suitable means, not shown y other suitable means, not shown',fmi gflit be inserted between the said collar and the endbefapplied to the shaft'S,

On, the end 'of the shaft S adjacent the disof the adjacent bearing hiito'fresist end thrust on the shaft due tof compression on the material when the machine is in -operation. l

Simultaneous adjustment of the scrolls'D relative to the stationary'parts b is accom plished by adjusting the collar L at the end of the shaft, which canbe turned to set the scrolls at 4any predetermined distance from the opposed stationary parts. The set s'crew L may l beV tightened to lockf'the collar against rotation after the scrolls are adjusted.

n operation, the crushed pr-f'duetfrom the roller mill is fed into the machine through thespout C, and the'first scroll D moves it inward 'toward-the-discharge and presses the'material against theadjaceiit partition or 'parts4 b; the material escapes 4through the-wedge shaped openings between the parts b into the next compartment wherein the same process is repeated.;v when the material finally reaches the l.discharge end the last scroll presses it against the wooden lining W The material is ultimately ejected througli the opening a, when lio vaivqn,fwyhihguniiaae1y yang to, @pres-j 'sure placed uponthe material by the scrolls .and allowsthe material to pass out into the 'discharge housing K. ",Theam'ount 'of pres-` by adjustingthfweight H.

VVhilethis nventionfappears it is quite important commercially. and Vis a distinct .additio'nto the list ofmachines used sure exerted on the lmaterial being regulated` to be Simple in' the manufacture 'of flour, lts essential object and effect isto rub thecrushed prodl' "uct"lightly, stir it, turnit over under :Sonie pressure, and repeat such operations until the adheringr particles of previously crushed grain kernels andhnlls are separated or. der tached.

.'Itfwill be seen that the spaces between the' triangular parts practically' form notches; in the partitions, and the material passes through' .these notches or 'spaces Abetween the parts b, .and is subjected to rub- .bing againstthe front faces of the. lpart b,

' gularly shaped p'arts `adapted to provide `an opening for .the passage ofmaterial enlarging toward the axis of the partition and contracting toward the .periphery thereof.

2. In a mill of the character described,v the combination `of a body, an axial shaft ex: tending therethrough, a series ofl scrolls on said shaft, partitions ,between the scrolls, each partition comprising an'v annular series of triangularly ,shaped parts, adapted to provide an opening for the passage of material enlarging toward the axis of the partition and contracting toward the periphery thereof, and a wooden lining in the rear end of the cylinder opposite the last. scroll.

In a mill of the character described, the combination yof a body, an axial shaft extending therethrough, aseries 'of scrolls on said shaft,` partitionsbetween the scrolls, and a wooden iining in the rear endof the cylinder'opposite the last scroll, the grain of the wood bein inclined obliquely to the opposed scroll, substantially as described.

4. In a mill ofthecharacter described, the combination or' a body, an axial shaft ex tending therethrough, aseries of; scrolls on said shaft, partitions between "the scrolls, each partition having an annular series of triangularly shaped parts, adapted to provide an opening for the passage of niterial enlarging toward the axis of the partition and contracting toward the periphery thereof, and a wooden lining in the rear end of the cylinder opposite the last scroll or pachter screw thefgrain' of 'wood'bemg inclined oblique'ly tof-the end wallof the body,,substantiallyl 'as described, A I 5,-In a. machine ofjthe'character specied, the combination, of a casing-*having achamf ber` provided with .a feed openin one end andan outlet opening'in theot erend', a. .shaft extending axially through said-cham'- ber, a series ofscrolls onfsai'd shaft, and par'-Y "titions within the chamber intermediate the .scrolls adapted vtov provvide` anr opening for the passage o f material enlarging toward the .axis of :the partition andcontracti'n toward the peripheryY thereoi'fand a yielda legpressure regulating controlling valve i closing .said outlet opening.

6. In a machine of the character described, I

the "combination ofga-casing' having-a feed opening 1n one end and an outletopening in the other end, a shaft extending axially 1- tlirough said casing, a series of scrolls on said shaft, annular partitions :Within the chamber intermediate the scrolls, each partition having an annular series of t'riangula'rly shaped parts projecting toward the shaft adaptedto .provide 'an opening for the passage of material enlarging toward vthe axis ofthe partition and contracting toward the periphery thereof, and a yieldablepressure controlling valve closing said .outlet opening.

7. In a mill' of the character described, the combination ofa body having a feedopening in one' endland an: outlet opening in the other end, an axiallyA disposed shaft extendingthrough said body, a series of scrolls on said shaft, and partitionsibetween the scrolls,

Aeach partition having .an annular series of triangularly shaped parts, the'apexes of the partsponting toward the axis ofthe shaft and adapted to provide an opening for the passage of material enlarging toward the axis of the partitionand contracting toward the periphery thereof, and al yie-ldable weightcontrolled valve closing said opening.

8. The herein described machine compris i'ng a body having a feed opening at one end andan outlet opening at the other end, a valve closing said outlet opening, and means for yieldingly, holding this valve in closed position, with a shaft disposed axially of the cylinder, a series of scrolls on said shaft between the feed opening and the outlet opening, a series of notched partitions interposed between the vadjacent scrolls and adapted to provide an opening for the passaffe of material enlarfrin toward the axis C l b t of the partitions and contracting toward the periphery thereof and a wooden liningat-fthe end of the chamber adjacent the outlet l @il positijen; with a'shat-'disposed axially of i s the cylindery a series` of 'scrolls on said shaft betweengflthe feed bpeiiing .and the outlet opening, aseries qfpartitions provided with `inwardly {precting' parts' interposed lbetween fthe l adjacent scrolls adapted to pro? opening at one end and an outlet opening at its'other, end, a valve closing said outlet opening, a slidable bar carrying said '.valve,

Aan arm on saidbar, anda Weighted leverI engaging vsaid arm to holdv the valve yieldably closedrwith `ashaft' disposed axially 'of the cylinder, a series of scrolls or packer screws on said shaft between the feed and outlet openings, and a series of partitions linterposed between the adjacent scrolls or packer screws and adapted to" provide an opening for'the. passage of material enlargof two witnesses.

ing-toward the. axis oftheipartition and comtracting toward the 'periphery thereof.

11. .ilhe herein describedI machine comprising "a cylindrical `-body. having a feed opening at one end and an outlet opening at the .ether end, a valve closing said loutlet the valve in closed position; `with a shaft disposed axially ofthe cylinder, a series of scrolls onsaid shaft between the `feed and outletv openings, a series of y partitions provided with inwardlyprojecting triangularly shaped parts interposed between the adjacent lscrolls, and adaptedvto provide an opening for the passage ofmaterial enlarging toward the agis of thepartition and contracting toward the periphery thereof, and a Woodenlining at the 'end .of the chamber adjacent the 'outlet openings having itsgrain oblique to theaxis of the chamber.

. opening, and means for yieldingly` holding In testimony. that I claim the foregoing as my own, I aiix .my signature in presence JOHN B. CORNWALL.

Witnesses:

CLARENCE E. MALCOLM, 'A HERBERT P. WILSON. 

